Portable rechargeable battery pack



FIG. 1 is a top view of the portable rechargeable battery pack according to the present invention;

FIG. 2 is a bottom view of the portable rechargeable battery pack shown in FIG. 1;

FIG. 3 is a front view of the portable rechargeable battery pack shown in FIG. 1;

FIG. 4 is a rear view of the portable rechargeable battery pack shown in FIG. 1;

FIG. 5 is a right side view of the portable rechargeable battery pack shown in FIG. 1; and,

FIG. 6 is a left side view of the portable rechargeable battery pack shown in FIG. 1. 

The ornamental design for a portable rechargeable battery pack, as shown and described. 